#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	long long  n;
	long long  a[100005];
	scanf("%d",&n);
	a[1]=0;
	for(long long i=1;i<n;i++)
	{
		if((i+1)%2==0)
		{
			a[i+1]=min(a[i-1]+1,a[(i+1)/2]+1);
		}
		else 
		a[i+1]=a[i]+1;
	}
	printf("%d",a[n]);
	return 0;
}